<template>
  <div class="PieChart">
    <div v-if="chartData && chartData.length" class="chart-box">
      <div ref="chartRef" class="chart"></div>
      <div class="bg-box"></div>
      <div class="tl-box"></div>
    </div>
    <div v-else class="s-empty">
      <img src="@/assets/images/noData.png" alt="" />
    </div>
  </div>
</template>

<script setup lang="ts" name='PieCharts3D'>
import { onMounted, defineProps, watch, nextTick, ref, onUnmounted } from "vue";
import { nowSize } from "@/utils/utils";
import * as echarts from "echarts";
import 'echarts-gl';
const props = defineProps({
  chartData: {
    type: Array,
    default: () => [],
  },
});
const chartRef: any = ref(null);

let myChart: any;

watch(() => props.chartData, async () => {
  if (props.chartData && props.chartData.length) {
    await nextTick();
    initChart();
  }
},
  { immediate: true },
);

// 初始化echarts图表
const initChart = () => {
  if (!myChart) {
    myChart = echarts.init(chartRef.value);
  }
  const option = getPie3D(props.chartData, 0.7);
  // option.series.push({
  //   name: 'pie2d',
  //   type: 'pie',
  //   labelLine: {
  //     lineStyle: {
  //       opacity: 1,
  //       color: '#fff',
  //     },
  //     length: nowSize(20),
  //     length2: nowSize(20),
  //   },
  //   label: {
  //     opacity: 1,
  //     fontSize: nowSize(40),
  //     fontWeight: 700,
  //     color: '#fff',
  //     formatter: (params: any) => {
  //       return params.percent + '%'
  //     },
  //   },
  //   startAngle: 360, //起始角度，支持范围[0, 360]。
  //   clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
  //   radius: ['76%', '76%'],
  //   center: ['35%', '49%'], //指示线的位置
  //   data: props.chartData,
  //   itemStyle: {
  //     opacity: 0,
  //   },
  // });
  option && myChart.setOption(option, true);
};
// 判断是否有数据，有数据渲染eChart图
const handleResize = async () => {
  if (myChart) {
    myChart.resize();
    initChart();
  }
};

// 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
function getParametricEquation(startRatio: any, endRatio: any, isSelected: any, isHovered: any, k: any, h: any) {

  // 计算
  let midRatio = (startRatio + endRatio) / 2;

  let startRadian = startRatio * Math.PI * 2;
  let endRadian = endRatio * Math.PI * 2;
  let midRadian = midRatio * Math.PI * 2;

  // 如果只有一个扇形，则不实现选中效果。
  if (startRatio === 0 && endRatio === 1) {
    isSelected = false;
  }

  // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
  k = typeof k !== 'undefined' ? k : 1 / 3;

  // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
  let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
  let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;

  // 计算高亮效果的放大比例（未高亮，则比例为 1）
  let hoverRate = isHovered ? 1.05 : 1;

  // 返回曲面参数方程
  return {

    u: {
      min: -Math.PI,
      max: Math.PI * 3,
      step: Math.PI / 32
    },

    v: {
      min: 0,
      max: Math.PI * 2,
      step: Math.PI / 20
    },

    x: function (u: any, v: any) {
      if (u < startRadian) {
        return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
      }
      if (u > endRadian) {
        return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
      }
      return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
    },

    y: function (u: any, v: any) {
      if (u < startRadian) {
        return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
      }
      if (u > endRadian) {
        return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
      }
      return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
    },

    z: function (u: any, v: any) {
      if (u < -Math.PI * 0.5) {
        return Math.sin(u);
      }
      if (u > Math.PI * 2.5) {
        return Math.sin(u) * h * .1;
      }
      return Math.sin(v) > 0 ? 1 * h * .1 : -1;
    }
  };
}

// 生成模拟 3D 饼图的配置项
function getPie3D(pieData: any, internalDiameterRatio: any) {

  let series = [];
  let sumValue = 0;
  let startValue = 0;
  let endValue = 0;
  let legendData = [];
  let k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3;

  // 为每一个饼图数据，生成一个 series-surface 配置
  for (let i = 0; i < pieData.length; i++) {

    sumValue += pieData[i].value;

    let seriesItem: any = {
      name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
      type: 'surface',
      parametric: true,
      wireframe: {
        show: false
      },
      pieData: pieData[i],
      pieStatus: {
        selected: false,
        hovered: false,
        k: k
      }
    };

    if (typeof pieData[i].itemStyle != 'undefined') {
      let itemStyle: any = {};

      typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null;
      typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : null;

      seriesItem.itemStyle = itemStyle;
    }
    series.push(seriesItem);
  }

  // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
  // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
  for (let i = 0; i < series.length; i++) {
    endValue = startValue + series[i].pieData.value;

    series[i].pieData.startRatio = startValue / sumValue;
    series[i].pieData.endRatio = endValue / sumValue;
    series[i].parametricEquation = getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, series[i].pieData.value);

    startValue = endValue;

    legendData.push({
      name: series[i].name,
      itemStyle: {
        opacity: 1,
      }
    });
  }

  // 补充一个透明的圆环，用于支撑高亮功能的近似实现。
  series.push({
    name: 'mouseoutSeries',
    type: 'surface',
    parametric: true,
    wireframe: {
      show: false
    },
    itemStyle: {
      opacity: 0
    },
    parametricEquation: {
      u: {
        min: 0,
        max: Math.PI * 2,
        step: Math.PI / 20
      },
      v: {
        min: 0,
        max: Math.PI,
        step: Math.PI / 20
      },
      x: function (u: any, v: any) {
        return Math.sin(v) * Math.sin(u) + Math.sin(u);
      },
      y: function (u: any, v: any) {
        return Math.sin(v) * Math.cos(u) + Math.cos(u);
      },
      z: function (u: any, v: any) {
        return Math.cos(v) > 0 ? 0.1 : -0.1;
      }
    }
  });

  // 准备待返回的配置项，把准备好的 legendData、series 传入。
  let option = {
    //animation: false,
    legend: {
      orient: "vertical", // 垂直排列图例
      top: "center",
      left: "58%",
      icon: "rect",
      itemGap: nowSize(50),
      itemWidth: nowSize(32), // 设置图例标记的宽度为正方形
      itemHeight: nowSize(32), // 设置图例标记的高度为正方形
      textStyle: {
        padding: [0, nowSize(5), 0, nowSize(5)],
        rich: {
          name: {
            fontSize: nowSize(40), // 可以根据需要调整大小
            color: "#fff",
          },
          value: {
            color: "#00FFFF",
            fontSize: nowSize(40),
            padding: [0, nowSize(200)], // 添加右边距以分隔名称和数值
          },
        },
      },
      formatter: function (name: any) {
        let item: any = props.chartData.find(function (d: any) {
          return d.name === name;
        });
        return `{name|${item.name}}{value|${item.value + '%'}}`;
      },
      data: legendData
    },
    tooltip: {
      borderColor: '#116fc1',
      borderWidth: nowSize(2), // 设置边框宽度
      backgroundColor: 'rgba(7,31,52,0.8)',
      textStyle: {
        color: '#BBD0DC',
      },
      formatter: (params: any) => {
        if (params.seriesName !== 'mouseoutSeries') {
          return `${params.seriesName}<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>${option.series[params.seriesIndex].pieData.value}`;
        }
      }
    },
    xAxis3D: {
    },
    yAxis3D: {
    },
    zAxis3D: {
      min: 0,
      max: 'dataMax'
    },
    grid3D: {
      show: false,
      top: nowSize(-30),
      left: nowSize(-200),
      boxHeight: 26,
      width: nowSize(1300),
      height: nowSize(600),
      viewControl: {//3d效果可以放大、旋转等，请自己去查看官方配置
        alpha: 16, // 视角倾斜角
        beta: -80, // 饼图旋转角度
        distance: 78, // 相机距离
        rotateSensitivity: 0,
        zoomSensitivity: 0,
        panSensitivity: 0,
        autoRotate: false
      },
      //后处理特效可以为画面添加高光、景深、环境光遮蔽（SSAO）、调色等效果。可以让整个画面更富有质感。
      postEffect: {//配置这项会出现锯齿，请自己去查看官方配置有办法解决
        enable: true,
        bloom: {
          enable: true,
          bloomIntensity: 0.1
        },
        SSAO: {
          enable: true,
          quality: 'medium',
          radius: 2
        }
      },
    },
    series: series
  };
  return option;
}

onMounted(() => {
  window.addEventListener("resize", handleResize);
});
onUnmounted(() => {
  myChart && myChart.dispose();
  window.removeEventListener("resize", handleResize);
});
</script>

<style lang="less" scoped>
.PieChart {
  width: 100%;
  height: 100%;

  .s-empty {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;

    img {
      width: 513px;
      height: 377px;
    }
  }

  .chart-box {
    position: relative;
    width: 100%;
    height: 100%;

    .bg-box {
      width: 367px * 1.5;
      height: 144px * 1.5;
      background: url("@/assets/images/chart-bg2.png") no-repeat center;
      background-size: 100%;
      position: absolute;
      top: 60%;
      left: 25.5%;
      transform: translate(-50%, -50%);
      z-index: 1;
    }

    .tl-box {
      width: 702px;
      height: 422px;
      background: url("@/assets/images/event-tl.png") no-repeat center;
      background-size: 100%;
      position: absolute;
      top: 50%;
      left: 73%;
      transform: translate(-50%, -50%);
      z-index: 1;
    }
    .chart {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      z-index: 2;
    }
  }
}
</style>
